Curious about growing the feline-friendly catnip (Nepeta cataria)? Why wouldn’t you be? A quick Instagram search brings up thousands of videos of cute kitties going bonkers over the green stuff. But catnip isn’t just for cat owners: It’s a delightful addition to any window herb garden and even consumable by humans. Catnip tea can help with stress and digestion. Here’s how to grow this purr-fect herb. Give your plant as much sunlight as possible.